Question: Who was Sigmund Freud most famous student?
Paraphrase: What famous person did Freud teach?
SPARQL (Wikidata):  select distinct ?sbj where { ?sbj wdt:P1066 wd:Q9215 . ?sbj wdt:P31 wd:Q5 } 
Answer: Hanns Sachs, Igor Stepanovich Sumbaev, Lou Andreas-Salomé